Power operated hinge-seat cutting hand tool



Nov. 15, 1960- A. M SUNDBY POWER OPERATED HINGE-SEAT CUTTING HAND TOOL F1ed Dec. 22^ 1958 energize the n10tor 23 by depressing the Switch 18 torotate the circular blade saw 25. It wi11 be understood that the depthof the cut has been previously deternlined ald set by adjustment of thehad SceW 20. T'hus With the saw blade rotating, the tool iS advanced t()its Work by llanual downward pTessure on the tool by the operator untilthe lower end portion of the hand screw 20 engages the stud zz in thebase plate Both the cuts fol the respective hinge ateS l are nladesinlultaneus1y and in exact op...0sed algnInent assuring a perfect t androper hanging 0f the d00r. (bviously, the same Oce dure would be fouowedin I11a1 ing the subsequent cuts for the center and lower hngeS on ad00r and the jan1b. The tool is neely Temoved from the position of theiust noted cut and placed in proper 1)0Sition by i11serting the Hanges 7and 8 between the mounted edge of the door and he janlb While the doorTemains in position.

Whe there are herein disc10sed but a limited number of embodiments ofthe Structure, rocess and p0duct of the invention herein presented, itis p0sSibe to produce Still other enbodiTnentS Without departing fTO1the inven tive concept herein disc10sed, and it is desifed, therefore,that only Such linitations be i1111osed on the appended daims aS areStated herein OT Tequired by the rior at' what I claim is:

1' A 0-vered hand t00l for SilT1111ta11e0usly cutting hinge-Seats for ad00r and a d00r iaITlb to Teceive opp0sed hnge plates, con1prising incombination, a base plate, a Supporting am hingedly mounted on sad base1)late for pivotal movement relative to the base plate, an electricmotor rigidly Secued to said supporting arm and cutting nleans driven bySaid n10tor, Said cutting nleanS being advanced t0 its vvofk bynanllally inlpatted ressure on the Supporting arm and itS nOuntedcomponents.

2 A powered hand t00l OT SiInulaneously cutting hinge-Seats for a d00rand a door j2Ltnb to receive opp0sed hinge plates, c0mprising inc0[nbination, a Telatively thin and Hat rectangular base late, a )ail'Of depending anges integral With the Tight hand edge portion of saidbase plate, Said anges beng at right angles to the suTface of the base1ate, a rearwadl o ectin elon ated su )()Tting an1 hingedly mounted atone end portion of the base plate, thus permitting pivota1 movement, ofthe Supporting arnl, and means nornlally holding said supporting an1 ina Tetracted position Telative to the ba'se plate, an electric ]Ilotorenergized by a Switch integral vvith the suppofting artn, and cuttingmeans in the forn1 0f a ci1-cular Saw driven by the electric motor andadvanced t0 its Work as downward pressure is exerted on the sup portingarm 3. The structure deiined in claim 2 further including means to limitthe downward movement of the supporting arm and its mounted c0mponents,and 1Tleans for l0ckng said position 4- A Povvered hand '()()l forSinultane0uSly cutting hinge-seats for a door and a door jaInb toreceive opposed hinge 1ates, con prising in combination, a Telativelythin and at, rectangular base plate, a pair of depending angeS integra1With the tight hand edge portion of the base plate and at Tight anglestheret0 to aord a Spacer and alignment means for the tool when the Sameis positOned on its Work, Said 1angeS being spaced apart longitudinallyto aord a passageway therebetween, a rear Wardly projecting e10ngatedsupporting arm hingedly mounted at one end portion to the base platethus per mitting pivota1 upward Svvinging novenlent of the Sup portingarm, a hand grip f0med in the rear end 1)0Ttion of the S11) )()rti11garn1 and spring neanS 1()I'1Ilally holding the Supp0fting arm inretracted position telative to the base plate a hand Screw having Screwhl'eaded engage ment With the Tear eIld portion 0f the supporting armcooperating with a stop nlember in the base plate to lin1it the downwaTdmovement of the supporting arm, a geated electric n10tor secured to theunderside 0f the supporting all Substantially at its 10I1gitudina1center, Said Inotor being actvated by a trigger Switch adjacent thehnd1e portion of tIle Supporting arn1, and a circular saw diVen by thegeared electric motor and advanced to its w0k by maua d0mWard pressureon the handle portion 0 the Supporting arm lefeenceS (ied ill the fileof this patent UNITED STATES PATENTS 768,os8 Mackenzie Aug. 23, l04 l016,34l Lowden Feb. 6, -19 12( 2,348,406 0gren May 9 1944 2 674 280Pierce Apr. 6, l94 2,778,lzl Guerrant jan 22, '1957 2,80l,6js zem Aug.19S7 2 8S4 761 Graham Oct. 7 -1958

